I had this issue a few years ago and decided buying some extra disks
to use as scratch was a better move for me. In your shoes I would
have found 6 extra SATA ports on a machine (any machine), created the
new filesystem and rsynced the data across, then swapped the disks
into the production machine.
Brad,
I try to keep disks from different production batch in my MD as
proabilistically speaking, this is safe. This means I buy one disk every
year and replace the oldest one. This time it is special case that My
last 3TB got replaced with new 6TB and now I can actually expand the
array. So, the above method may not always work for me. However, I see
your point and therefore see merit to it. In any case, I am taking
Andreas (and few others) advice and try to build several smaller MD
devices instead of one large one. I responded to him on this idea. Let
me see if any one sees issues with that.
Ramesh
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